Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
cac duc » cac du, cao duc, cac dac
tu sach » su sach, te sach, tu cach
ve cac » va cac, vien cac
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ((y nang) or (v nang)) xa hoi. hieu ve cac duc ban hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ((y nang) OR (v nang)) xa hoi. hieu ve cac duc ban hanh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ((y nang) or (v nang)) xa hoi. hieu ve cac duc ban hanh vai cua te*".